Mg2 + 2HCI(aq) → MgCI2(g) + H2(g)
A. 1.0g
B. 2.0g
C. 6.0g
D. 12.0g
E. 24.0g
Correct Answer: Option A
Explanation
Mg2 + 2HCI(aq) → MgCI2(g) + H2(g)
24g of Mg2 reacts with 2g H2
therefore, 1g of Mg will react with = 2/24g H2
12g Mg2 = 2/24×12g H2
= 1g H2.
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